Daisy Doo & TuxieGirl BettyIt's always #Caturday at Our House. Lookit what my dad made for 🐈 us. It's stage 1 of our Gym Wall that will be 😺critically important this winter when Betty & I won't be able to be out on the #Catio. My dad be The Best Cat Daddy EVER! 😸#Catify #CatsOfMastodon
Lojie 
@666k9s Very cool!
Another great idea I saw on a foster cam was a large sturdy
carpet/rug on the wall,
for the kittens and cats to climb.
Have to look for screenshots, in the meantime this shows the idea:
https://ikeahackers.net/2015/03/climbing-wall-cats.html (see pic)
and
https://www.youtube.com/watch?v=mV82OKbNNvs
